Smoke detector



FIG. 1 is a diagrammatic perspective view of the smoke detector, with the cord broken away to indicate indeterminate length;

FIG. 2 is a front elevational view thereof.

FIG. 3 is a rear elevational view thereof.

FIG. 4 is a top plan view thereof.

FIG. 5 is a bottom plan view thereof.

FIG. 6 is a left side elevational view of the smoke detector; and,

FIG. 7 is a right side elevational view thereof. 

The ornamental design for a smoke detector, as shown and described. 